Date:         Thu, 15 May 1997 01:55:12 +0100
Reply-To:     John Whittington <johnw@MAG-NET.CO.UK>
Sender:       "SAS(r) Discussion" <SAS-L@UGA.CC.UGA.EDU>
From:         John Whittington <johnw@MAG-NET.CO.UK>
Subject:      Re: T-tes to test if mean=a certain value
Comments: To: cody@UMDNJ.EDU
Content-Type: text/plain; charset="us-ascii"

On Wed, 14 May 1997, Ron Cody <cody@UMDNJ.EDU> wrote:
 
>   You can subtract the population value from each observation in a data
>step and then use PROC MEANS with the T and PRT options to test if the
>new variable is significantly different from zero.  For example:
 
Ron, whilst I confess that this is almost certainly what I would do, I
wonder if it is strictly correct.  Shouldn't one strictly use a non-central
t-test in such a situation?  Just for the sake of saying it, you could
obviously use PROC UNIVARIATE instead of PROC MEANS for your method.
 
Regards,
 
John
 
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